[INFO] fetching crate slings 0.3.46...
[INFO] building slings-0.3.46 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate slings 0.3.46 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate slings 0.3.46
[INFO] finished tweaking crates.io crate slings 0.3.46
[INFO] tweaked toml for crates.io crate slings 0.3.46 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate slings 0.3.46 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate slings 0.3.46 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77393c392b4ed17e311efcfe5f36d5702a36f40fe59a41d8f838d0240dface72
[INFO] running `Command { std: "docker" "start" "-a" "77393c392b4ed17e311efcfe5f36d5702a36f40fe59a41d8f838d0240dface72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77393c392b4ed17e311efcfe5f36d5702a36f40fe59a41d8f838d0240dface72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77393c392b4ed17e311efcfe5f36d5702a36f40fe59a41d8f838d0240dface72", kill_on_drop: false }`
[INFO] [stdout] 77393c392b4ed17e311efcfe5f36d5702a36f40fe59a41d8f838d0240dface72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70805838d649e93b8e0dc8e46e1178f9a697ec0b71db848c5da1b8e61c861568
[INFO] running `Command { std: "docker" "start" "-a" "70805838d649e93b8e0dc8e46e1178f9a697ec0b71db848c5da1b8e61c861568", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling io-uring v0.6.0
[INFO] [stderr]    Compiling futures-io v0.3.28
[INFO] [stderr]    Compiling scoped-tls v1.0.1
[INFO] [stderr]    Compiling async-task v4.4.0
[INFO] [stderr]    Compiling socket2 v0.5.3
[INFO] [stderr]    Compiling slings v0.3.46 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/driver/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(Box<dyn Any>),
[INFO] [stdout]     |     ------- ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 192 -     Ignored(Box<dyn Any>),
[INFO] [stdout] 192 +     Ignored(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "70805838d649e93b8e0dc8e46e1178f9a697ec0b71db848c5da1b8e61c861568", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70805838d649e93b8e0dc8e46e1178f9a697ec0b71db848c5da1b8e61c861568", kill_on_drop: false }`
[INFO] [stdout] 70805838d649e93b8e0dc8e46e1178f9a697ec0b71db848c5da1b8e61c861568
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af416f1fe9c014f0c7e749cbc673312090bacb0db5c52469dc57b3a8720bb437
[INFO] running `Command { std: "docker" "start" "-a" "af416f1fe9c014f0c7e749cbc673312090bacb0db5c52469dc57b3a8720bb437", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/driver/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(Box<dyn Any>),
[INFO] [stdout]     |     ------- ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 192 -     Ignored(Box<dyn Any>),
[INFO] [stdout] 192 +     Ignored(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling slings v0.3.46 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/driver/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(Box<dyn Any>),
[INFO] [stdout]     |     ------- ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 192 -     Ignored(Box<dyn Any>),
[INFO] [stdout] 192 +     Ignored(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.76s
[INFO] running `Command { std: "docker" "inspect" "af416f1fe9c014f0c7e749cbc673312090bacb0db5c52469dc57b3a8720bb437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af416f1fe9c014f0c7e749cbc673312090bacb0db5c52469dc57b3a8720bb437", kill_on_drop: false }`
[INFO] [stdout] af416f1fe9c014f0c7e749cbc673312090bacb0db5c52469dc57b3a8720bb437